The duo have played together for several years at Arsenal and at international level, but the 31-year-old feels that the centre-back is starting to flourish as one of the top players in his position at the World Cup.
Sagna told reporters: "For me Laurent is one of the best defenders in the world. I'm lucky enough to have played with him at Arsenal and he's a complete player.
"He brings a lot to this team and he proved against Ecuador he's very solid. I think he's ready to play in any situation. It's not a problem for him. We saw against Ecuador that he played on the right, for Arsenal he plays left.
"In my opinion he's two-footed and it's the same for him on either side. It's not a problem for him because he's a quality player and they can adapt to anything."
France face off in their second round clash with Nigeria later today.